Astra Lakemedel Aktiebolag

Gad Salemnick

Joseph Kaspi

Haim Yellin

David Ladkani

Stephan Cherkez

Clara Schoenberger

Jacob Vaya

Process for the preparation of 1'-ethoxy carbonyloxy ethyl esters of penicillins, wherein a compound of the formula ##STR1## in which A is phenyl, phenoxy or 4-hydroxyphenyl, B is hydrogen, an amino group or a protected amino group and Z is hydrogen or a cation selected from the group of alkali metal, tri (lower alkyl ) ammonium and tetra (lower alkyl) ammonium, is reacted with 1-bromoethyl ethyl carbonate in an organic solvent and when B is a protected amino group the protecting group is split off to yield a primary amino group. There are also provided novel compounds of the formula ##STR2## in which Ph is phenyl and R is CH.sub.3 -- or C.sub.2 H.sub.5 --.

Growing community of inventors

Jerusalem, Israel

Gad Salemnick